Machine for shaping the ends of metal bars.



No. 811,771. PATENTED FEB. 6, 1906.

H. GBISBNHONBR, MACHINE FOR SHAPIEG THE ENDS 0P METAL BARS.

AIPLiQAiIOK FILED 8391. 29, 1902.

Witnesses: lnveniar:

Q Hem" e5 enhner;

"UNITED STATES OFFICE.

HENRY GEISENHQNER, OF SUHENEGTADY, NEW YORK, ASSIGNOR TO GEN ,ERAL ELECTRIC COMPANY, A UORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed September 29, 1902. Serial H0. 125,284.

To all (07:42:11 it new concern.-

Be it known that I, HENRY Gnisnnnonnn, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Machines for Shaping the Ends of Metal Bars, of which the following is a specification.

This invention, relates to metal-workin machines; and its object is to rapidly and cheaply shape the ends of metal bars, such as the keys used for fastonin belt-pulleys, gearwheels, and the like to siafting. It is well known that the ends of such keys must be rounded in order to lit the ends of the key =ways, the latter having rounded ends because they are milled out by a cylindrical cuttor. Heretofore the keys have been shaped by hand or in a inilling machine, so that one workman could turn out but a few hundred in a day. By my. invention he can make several thousand in the same time and much more accurately than by hand.

My invention consists of a machine in which a reciprocating shearing-tool having a suitably-shaped cutting ed e is caused to pass transversely across the on of a blank having square ends, thus cutting off the corners of the blank and roundin the end. Suitable ho ding and gaging devices are provided to insure uniformity in the keys and enable those of the same size to be interchangeably used.

In the accompanying drawings, Figure 1 is a front elevation of the machine. Fig. 2 is a top plan view, on an enlarged scale, of the blank holder and gage. Fig. 3 is a longitudinal section of the same. Fi 4 is a side elevation of the shearing-tool. *ig. 5 is an end view of the same. Fig. 6 is a perspective view of the guide'plate for said tool. Fig. 7 is a perspective view of one of the rests for the blank, and Fig. 8 is a perspective view of a finished key.

The in achine in the main resembles a punching-rnachine, having a bed 1 and standards 2, carrying bearings 3 for a power-driven cranksh aft 4, which reciprocates a cross-head 5 in vertical guides 6 above the bed. On the bed is fastened a plate 7, havin at one end a shallow circular socket in w 'ch is rotatably mounted a work-holder consisting of a cylinder 8, provided with a circumferential groove 9. Retainingsegments 10 are bolted inserted into a socket in or otherwise shaping to the ilate 7 and project into the groove 9 to hol the cylinder in place in the socket, but leave it free to rotate therein. In the walls of the cylinder are one or more transverse slots 11, preferably radial and of differ entsizes. In each slot is a short bar 12, serving as a rest for the key-blank. The slot or the upper surface of the rest or both, is or are inclined slightly upward and inward for a purpose hereinafter set forth. A clampingsc-rew 13 passes transversely through the holder into each slot. In the upper end of the cylinder is secured a guide 14 for the shearing-tool 15, which is secured by a setscrew 16 in a socket 17, having a shank 18,

' the cross-head and T he sides of the fastened by a set-screw 19. 7

26 of semicircutool have longitudinal flutes lar or other shape in cross-section and of different sizes. The guide 14 has teeth 21, fitting into said flutes, and the ends of the rests 12 conform to the sha e of the tool.

The tool is not withdrawn from the guide 14 at the upper end of its stroke, so that it is always in ahnement with the slots 11 in the holder, which is thus maintained concentric therewith.

The plate 7 has a longitudinal guideway parallel to a radius of the cylinder, such as the parallel slots 22, and a gage-block 23 can be clamped at any point along the slots by suitable means, such as the bolts 24. The block has cars 25, in one ofwhich is pivoted a stop 26, which when down engages with the other ear.

The operation of the machine is as follows: The key-blanks consist of metal bars of the desired length, width, and thickness having square ends, as indicated in dotted lines at the right-hand end of Fig. 8. They can be rapidly made by sawing up a long rod into proper len ths. When a quantity of a given size have con prepared, the workman selects the slot in the cylinder which fits the blank and turns the cylinder to brin said slot to the front. The tool turns wit the cylinder, the set-screw 19 being slacked off until the cylinder and tool are in the right position and then ti htened. The gage 23 is then adjusted, so t at when the outer end of the blank rests against the stop 26 its inner end will be in line with the deepest part of the flute 20 in the tool corresponding with the slot selected. The clamping-screw 13 is then set tightly against the blank. The maing one or more radial slots, and a clampingchine is then started and the tool descends, shearing oil the superfluous metal from the end of the blank and leaving it rounded, as shown in Fig. 8, or otherwise shaped, according to the shape of the tool. The shearing action of the tool tends to draw it diagonally across the blanks, and it is in order to counteract this effect that the rest is inclined upward. The divergence from a line normal to the axis of the tool is just enough to cause the shaped end of the key to be perpendicular to its top and bottom. By lifting the stop 26 the blank can be slid out for reversal end for end, and the finished key 27 can be similarly removed after both ends have been shaped.

What I claim as new, and desire to secure by Letters Patent of the United States, is

l. A machine for shaping the ends of metal bars, comprising a shearing-tool, a workholder adjacent to the line of movement of verse to said line of movement, and a workrest in each slot having its end conforming to the shape of the tool.

2. A machine for shaping the ends of metal bars, comprising a shearing-tool, a workholder adjacent to the line of movement of said tool and having one or more transverse slots, and a work-rest in each slot having its upper surface inclined slightly upward toward the tool.

3. A machine for shaping the ends of metal bars, comprising a shearing-tool, a workholder adjacent to the line of movement of said tool having one or more radial slots in clined slightly upward toward the tool, a rest in each slot, and means for clamping the work in said slots.

4. A machine for shaping the ends of metal screw entering each slot.

6. A machine for shaping the ends of metal bars, comprising a shearing-tool, a rotatable work-holder concentric therewith. and having one or more radial slots, and a guide on said holder engaging with said tool to keep it in alinement with said slots.

7. In a machine for shaping the ends of metal bars, the mnnbination with a cylindrical work-holder having radial slots of different sizes of a shearin -tool havin cuttin I P h edges corresponding with said slots, and a guide on. said cylinder engaging with said tool during its entire stroke to keep it in proper alinement with said slots.

8. In a machine for shaping the ends of 1 metal bars, a work-holder comprising a plate, a cyhnder rotatable thereon and having radial slots, and a gage adjustable radially to said cylinder. said tool and having one or more slots transi 5). In. a machine for shaping the ends of metal bars, a work-holder comprising a plate,

a cylinder rotatable thereon and having radial slots, and a gage adjustable radially to said cylinder and provided with a pivoted stop.

10. In a machine for shaping the ends of metal bars, a comprising a block provided with. ears, and a stop pivoted to one of said ears for movement into inoperative position and engaging with the other.

11. In a machine for shaping the ends of metal bars, a work-holder comprising a plate having a shallow circular socket at one end and slots parallel with a radius of said socket, a cylinder rotatable in said socket and having radial slots and a circumferential groove, retaining-segments fastened to said plate and projecting into said groove, clmnping-screws entering said radial slots, and a gage-block having a pivoted stop and adjustable in said parallel slots.

In witness whereof I have hereunto set my hand this 22d day of September, 1902.

HENRY GEISEN HONER.

Witnesses:

HELEN ORFORD, G. G. HoLLIs'rnn. 

